TREND EM3_CT_N - Manual (Page 9)

Programming
PowerRail303 Page 7
3 Programming
3.1 Programming Menu
To enter programming mode: Hold and together for 5 Seconds.
The first programmable parameter, CT Primary, is displayed.
3.1.1 CT Primary Programming
Setup
CT 200
This should be set to match the nominal primary current rating, in Amps, of the external current
transformers (CTs) fitted to the meter. The CT secondaries must match the nominal input rating of
the meter (5A on standard meters).
Press the up key or down key to select CT values from a table of standard primary
currents.
Press when the desired value is set to move to the next parameter.
For primary currents not found in the standard table use fine adjust.
To enter/exit Fine Adjust mode, press and together for two seconds.
3.1.2 Nominal Primary Current Programming
Setup
CTf 190
Press the up key or down key to increase/decrease the CT primary setting in steps of
10A.
Press when the desired value is set to move to the next parameter.
3.1.3 Nominal Voltage Programming
Setup
Un 400
If no external Potential Transformer (PT) is fitted this is must be set to match the nominal line-line
voltage (Un) of the meter as detailed on its rating label.
If an external PT is fitted this should be set to match the PT nominal primary line-line voltage rating,
in volts. The PT secondary must match the nominal input rating of the meter (eg 110V L-L).
Press the up key or down key to select values from a table of standard PT primaries.
Press when the desired value is set to move to the next parameter.